import uuid

# Classes
#
class Manager():
    # Manager class to manage a notiframe session. 
    def __init__(self):
        self.devices = []
        self.manager_id = gen_id()

    def add_device(self, name): #add parameters for Device class constructor
        self.devices.append(Device(name))
    
    def remove_device(self, dev_id):
        for dev in self.devices:
            if dev.device_id == dev_id:
                self.devices.remove(dev)
                break

class Device():
    # Device class to contain a device's properties, layout and widgets
    def __init__(self, name):
        self.name = name
        self.device_id = gen_id()
        self.widgets = []

class Test():
    # Test class to test other classes and their functions.
    def __init__(self):
        #instantiate manager class
        self.manager = Manager()

    def test_all(self):
        manager_uuid = self.manager_uuid()
        device_uuid = self.device_uuid()
        add_device = self.add_device()
        remove_device = self.remove_device()

        print("manager id is valid: " + str(manager_uuid))
        print("device id is valid: " + str(device_uuid))
        print("added device: " + str(add_device))
        print("removed device: " + str(remove_device))

    # Note: Do function wrapper here for tests functions, to say "test_function_name" success/failure
    def manager_uuid(self):
        uuid_test = self.manager.manager_id
        return self.is_valid_uuid(uuid_test)

    def device_uuid(self):
        uuid_test = self.device.device_id
        return self.is_valid_uuid(uuid_test)

    # Test if manager class's gen_id function produces a valid uuid
    def is_valid_uuid(self, val):
        try:
            uuid.UUID(str(val))
            return True
        except ValueError:
            return False
    
    def add_device(self):
        len1 = len(self.manager.devices)
        self.manager.add_device("test")
        len2 = len(self.manager.devices)
        if len2 == len1 + 1:
            return True
        else:
            return False
    
    def remove_device(self):
        id = self.manager.devices[0].device_id
        len1 = len(self.manager.devices)
        self.manager.remove_device(id)
        len2 = len(self.manager.devices)
        if len2 == len1 - 1:
            return True
        else:
            return False


# Global Functions
#
def gen_id():
    return uuid.uuid4()


test = Test()
test.test_all()